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Review

Asus Zenfone 4 Pro ZS551KL Review: Solid Performance for the Price

MobilePhonesPro Editorial Team
March 17, 2026
7.1/10(Very Good)
Asus Zenfone 4 Pro ZS551KL

Our comprehensive review of the Asus Zenfone 4 Pro ZS551KL covers display quality, camera performance, battery life, and overall value. A solid choice in its price segment.

Pros

  • +Powerful Snapdragon 835 chipset for smooth performance

Cons

  • -Camera performance is average
  • -Battery life could be better
  • -No wireless charging
  • -Limited water resistance

Overview

The Asus Zenfone 4 Pro ZS551KL offers solid value in today's competitive smartphone market. With 5.5" AMOLED, Snapdragon 835, and 12 camera system, it aims to deliver a comprehensive smartphone experience.

Display

The 5.5-inch AMOLED display delivers impressive visuals. With a 60Hz refresh rate and 600 nits peak brightness, everyday usage is comfortable.

Display Score: 7/10

Performance

Powered by the Snapdragon 835 with 6GB RAM, the Zenfone 4 Pro ZS551KL handles everything from demanding games to multitasking with ease. Performance is competitive in its segment.

Performance Score: 8.3/10

Camera

The 12MP main camera produces good photos in most conditions. The telephoto lens adds versatility for portraits and distant subjects. Video recording at 2160p ensures your memories are captured in high quality.

Camera Score: 6.8/10

Battery

With a 3600mAh battery and 18W charging, the Zenfone 4 Pro ZS551KL gets through a typical day.

Battery Score: 5.5/10

Value

At $250, the Asus Zenfone 4 Pro ZS551KL is fairly priced for its capabilities.

Value Score: 7/10

Our Verdict

The Asus Zenfone 4 Pro ZS551KL offers a well-balanced package with good performance and features for its price. It's a smart choice for users who want quality without flagship prices.

7.1/10
Very Good
Overall Score